Feank j



(MedeL) F J GRODAVBNT Fastener for Meeting'Reils of Sashes.

No. 241,648. Patented May 17, 1881.

Fig, 4.

Wvf/zws s0 8 J/; .M mm

, UNITED STATES PATENT OFFICE.

FRANK J. GRODAVEN'I, OF SYRACUSE, NEW YORK.

FASTENER FOR MEETING-RAILS OF SASHES.

SPECIFICATION forming part of Letters Patent No. 241,648, dated May 17, 1881.

Application filed March 21, 1881.

To all whom t't may concern:

Be it known that I, FRANK J. GRODAVENT, of the city of Syracuse, in the county of Onondaga and State of New York, have invented a new and useful Improvement in Meeting- Rail Sash-Locks; and I do hereby declare the following to be a full, clear, and exact description of my invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, all of which form parts of this specification.

My invention relates to meeting-rail sashlocks; and it consists of a bed-plate to which is pivoted two arms, one of which is the operating-arm, the other the locking-arm. The whole is secured to the meeting-rail of the lower sash by screws, which pass through the bed-plate. On the upper sash is secured a corresponding bed-plate, to which is attached a hook or other device for engaging the lock-arm when the window isloeked.

In the several figures like letters refer to similar parts.

Figure l is a perspective view of my invention as seen when the window is locked. Fig. 2 is aplan of the same. Fig. 3 is a plan of my invention as seen when the window is unlocked. Fig. 4: is a front view as seen when the window is locked. f

In the drawings, Figs. 2 and 3, a is the lock in germ, pivoted to the bed-plate a by the pin 0, and b is the operating-arm, pivoted to the bed-plate n by the pin (1. Any design of thumb-piece or knob can be attached to the said operating-arm I).

The method of operating my invention is as follows: Power being applied to the operating- (Model) arm b, Figs. 1 or 2, motion is transmitted to the looking-arm a by the sector-cog or geartooth c, which meshes into the rectangular groove f and throws the locking-arm at around to place, permitting the segment m of the operating-arm b to move intothe segmental groove y of the locking-arm a. This lost motion permits the parts to be thrown out of gear, thereby securely unlocking the sash, as seen in Fig. 3. The operation for locking the sash is the same, only in a reverse direction, thereby securely locking the sash, as seen in Figs. 1 and 2.

My invention commends itself for its simplicity, as it obviates the use of springs, is selflocking when opened or closed, and is easily operated and applied.

Having thus described my invention and improved meeting-rail sash-lock, what I claim as my invention, and what I desire to secure by Letters Patent, is

A meeting-rail sash-lock consisting of the operatin g-arm b, with its segments ac or, having the sector-cog a between them pivoted upon the pivot (I and the locking-arm a, pivoted on the pivot c, and constructed with segmental grooves y y, the radii of which are the same as the radii of the segments 00 w, and having the rectangular groove f, to receive the sectorcog 6, when operating together substantially as shown, and for the purpose specified.

In testimony whereof I, the said FRANK J. GRODAVENT, have hereto set my hand.

I FRANK J. GRODAVENT.

Witnesses:

E1). 0. DITTLE, D. F. SETTLE. 

